2.5 Ton 16 SEER 96% AFUE 80,000 BTU Goodman Gas Furnace and Air Conditioner System - Downflow Review 2026

// Bottom Line

This Goodman combo system works best for contractors and homeowners replacing older equipment in downflow or horizontal installations where upfront cost matters. The 96% AFUE heating efficiency and 16 SEER cooling balance performance with affordability, though the single-stage compressor means it runs at full capacity rather than modulating for quieter operation.

Review

The Goodman 2.5 Ton 16 SEER combination system represents solid middle-ground equipment for contractors balancing cost and efficiency. This downflow unit bundles a 96% AFUE furnace with 80,000 BTU heating capacity alongside a 16 SEER air conditioner, hitting the efficiency sweet spot that qualifies for ENERGY STAR certification and most utility rebate programs. At $115, it's positioned as an accessible option for builders and HVAC companies standardizing on reliable Goodman equipment without paying premium pricing.

Performance data shows this unit delivers where it matters for heating. The two-stage burner modulates heating output for efficiency during mild weather, while the variable-speed ECM blower motor adjusts airflow to conditions rather than running constantly. Cooling performance reveals a design quirk: the 29,000 BTU capacity feels light for a 2.5-ton claim, running at 1,600 maximum CFM. The scroll compressor uses R410A refrigerant and handles 115V single-phase power on a 17.1 to 25-amp circuit, typical for residential installations.

Pros & Cons

Pros

96% AFUE furnace efficiency reduces heating costs significantly compared to 80-90% units
16 SEER cooling rating qualifies for ENERGY STAR and many utility rebates
Two-stage burner on furnace allows for more efficient part-load operation
Variable-speed ECM blower motor optimizes airflow and reduces electricity consumption
Scroll compressor with R410A capability provides reliable cooling for 2.5-ton capacity
Downflow/horizontal configuration fits tight basement or closet installations
10-year warranty with online registration provides solid coverage protection

Cons

Single-stage compressor runs full blast even in mild weather, causing higher noise at 71.5 dB
29,000 BTU cooling capacity underperforms its rated tonnage, creating a mismatch in the system design
Requires plastic/PVC exhaust flue, limiting installation flexibility in some older homes
Lower tonnage option would be more appropriate for most 2.5-ton applications

Who Should Buy

Best For

Contractors installing replacement systems in downflow or horizontal configurations where space is limited and efficiency rebates are available. Homeowners with tight budgets who want ENERGY STAR efficiency without premium variable-capacity features.

Consider Alternatives If

Anyone seeking ultra-quiet operation or buyers in areas with hot summers where a true 2.5-ton cooling capacity is essential should look at variable-stage compressor units instead.

2.5 Ton 16 SEER 96% AFUE 80,000 BTU Goodman Gas Fu

$115

Buy at HVACDirect →

Installation

Installation requires standard downflow or horizontal clearances. The unit weighs 30 pounds and measures 30 inches tall by 21 inches deep and wide, fitting most utility closets. Plastic PVC exhaust venting is required, simplifying flue requirements compared to metal ductwork systems. Connection points include 3/8-inch liquid lines and 7/8-inch suction lines with 3/4-inch insulation already included for up to 50 feet of lineset runs.

Warranty & Reliability

Goodman provides 10 years of parts coverage when you register online, which most contractors and homeowners complete during startup. This standard warranty covers compressor, heat exchanger, and controls. Registration is mandatory to activate coverage, so documentation during installation is critical. Coverage does not include labor costs, only parts replacement.

Specifications

SKU	LS38783850
Brand/Manufacturer	Online Supply
Cooling BTU	29,000
Heating BTU	80,000
Refrigerant	R410A or R22
Electrical	115 V. 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	71.5
Weight (in lbs)	30.000000
Feature	Spec
Energy Star	Yes
SEER1 (Efficiency)	16
Condenser Stages	Single Stage
Compressor Type	Scroll
Liquid Valve Size	3/8"
Suction Valve Size	7/8"
Max Breaker Size	25 amps
Min. Breaker Size	17.1 amps
Tonnage	5 Ton
Height	30"
Width	21"
Depth	21"
Resources	CAPF Installation Manual CAPF Specifications Sheet Goodman Evaporator Coil Warranty You will need Adobe® Acrobat® Reader to view PDF documents.
Safety Information	PROPOSITION 65 WARNING This product and many products on our site may contain a chemical know to the state of California to cause cancer or birth defects or other reproductive harm. For more information about Proposition 65 please Click Here.
AHRI Certificate Number	7368843
Airflow Direction	Downflow/Horizontal
Exhaust Flue Requirement	Plastic / PVC
Product Features	Rebate Available
Furnace Efficiency / AFUE	96%
Blower Motor	Variable Speed - ECM
Maximum CFM	1600
Configuration	Upflow / Downflow
Burner Stages	Two
Fuel Type	Propane, Natural Gas
Liquid Line	3/8"
Suction Line	7/8"
Style	A-Coil
Suction Line Insulation Thickness	3/4"
Length	50 feet

Frequently Asked Questions

Why does this 2.5-ton unit only cool 29,000 BTU when 2.5 tons equals 30,000 BTU? +

The 29,000 BTU cooling output indicates this system runs slightly underrated compared to its tonnage designation. This is common in entry-level units where manufacturers design for reliability over peak capacity. You'll get steady, dependable cooling in moderate climates, though it may take longer to recover from temperature spikes on extremely hot days.

Can I use this furnace in an upflow configuration instead of downflow? +

Yes, the specs confirm this unit supports both upflow and downflow configurations. However, verify your specific SKU documentation matches your installation direction before ordering. Improper orientation affects combustion airflow and efficiency, so confirm with the CAPF Installation Manual before proceeding.

Is 16 SEER better than the older SEER2 rating I'm seeing elsewhere? +

SEER and SEER2 are different rating systems. This unit's 16 SEER rating is from the older methodology. Under the newer SEER2 standard, this would rate lower. For direct comparison with newer units, request SEER2 specifications from manufacturers launching 2024-2025 models.

Does this Goodman unit work with smart thermostats and variable staging? +

The two-stage burner and variable-speed blower motor provide staging capability, but true smart modulation depends on your thermostat. Single-stage cooling limits efficiency gains from advanced controls. A programmable or WiFi thermostat will optimize heating cycles, though cooling will always run full capacity.

What happens if I don't register this unit for warranty coverage? +

Without online registration, Goodman's 10-year warranty becomes void. You lose parts coverage entirely. Register immediately after installation with proof of purchase and installation date. Keep your AHRI certificate (7368843) and documentation for any future claims.

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